<template>
	<view class="uni-numbox">
		<view @click="_calcValue('minus')" class="uni-numbox__minus uni-numbox-btns" :style="{background}">
			<text class="uni-numbox--text" :class="{ 'uni-numbox--disabled': inputValue <= 0 || disabled }" :style="{color}">-</text>
		</view>
		<input :disabled="disabled" @focus="_onFocus" @blur="_onBlur" class="uni-numbox__value" type="number"
			v-model="inputValue" :style="{background, color}" />
		<view @click="_calcValue('plus')" class="uni-numbox__plus uni-numbox-btns" :style="{background}">
			<text class="uni-numbox--text" :class="{ 'uni-numbox--disabled': inputValue >= max || disabled }" :style="{color}">+</text>
		</view>
	</view>
</template>
<script>

	export default {
		name: "UniNumberBox",
		emits: ['change', 'input', 'update:modelValue', 'blur', 'focus'],
		props: {
		    value: {
		        type: [Number, String],
		        default: '1'  // 默认值也应该是字符串
		    },
		    modelValue: {
		        type: [Number, String],
		        default: '1'
		    },
		    // min: {
		    //     type: String,  // 将类型改为字符串
		    //     default: '0'   // 默认值也应该是字符串
		    // },
		    max: {
		        type: String,
		        default: '100'
		    },
		    step: {
		        type: Number,
		        default: 1
		    },
		    background: {
		        type: String,
		        default: '#f5f5f5'
		    },
		    color: {
		        type: String,
		        default: '#333'
		    },
		    disabled: {
		        type: Boolean,
		        default: false
		    }
		},
		data() {
		    return {
		        inputValue: '0'  // 初始值也应该是字符串
		    };
		},
		created() {
		    // 在 created 钩子中，确保将字符串转换为数值
		    if (this.value === '1') {
		        this.inputValue = +this.modelValue;
		    }
		    if (this.modelValue === '1') {
		        this.inputValue = +this.value;
		    }
		},
		methods: {
		    _calcValue(type) {
		        if (this.disabled) {
		            return;
		        }
		    
		        const scale = this._getDecimalScale() || 1; // 默认为1或者根据实际情况设置
		        let value = this.inputValue * scale;
		        let step = this.step * scale;
		    
		        if (type === "minus") {
		            value -= step;
		            if (value < 0) {
		                value = 0;
		            }
		        } else if (type === "plus") {
		            value += step;
		            if (value > this.max * scale) {
		                value = this.max * scale;
		            }
		        }
		    
		        this.inputValue = (value / scale).toFixed(2); // 或者其他你需要的固定小数位数
		        this.$emit("change", +this.inputValue);
		        this.$emit("input", +this.inputValue);
		        this.$emit("update:modelValue", +this.inputValue);
		    },
		    _getDecimalScale() {
		        let scale = 1;
		        // 浮点型
		        if (~~this.step !== this.step) {
		            scale = Math.pow(10, String(this.step).split(".")[1].length);
		        }
		        return scale;
		    },
		    _onBlur(event) {
		        this.$emit('blur', event);
		        let value = event.detail.value;
		        if (isNaN(value)) {
		            this.inputValue = this.min;
		            return;
		        }
		        value = +value;
		        if (value > +this.max) {
		            value = +this.max;
		        } else if (value < +this.min) {
		            value = +this.min;
		        }
		        const scale = this._getDecimalScale();
		        this.inputValue = value.toFixed(String(scale).length - 1);
		        this.$emit("change", +this.inputValue);
		        this.$emit("input", +this.inputValue);
		        this.$emit("update:modelValue", +this.inputValue);
		    },
		    _onFocus(event) {
		        this.$emit('focus', event);
		    }
		},
		}
</script>
<style lang="scss" >
	$box-height: 26px;
	$bg: #f5f5f5;
	$br: 2px;
	$color: #333;

	.uni-numbox {
		/* #ifndef APP-NVUE */
		display: flex;
		/* #endif */
		flex-direction: row;
	}

	.uni-numbox-btns {
		/* #ifndef APP-NVUE */
		display: flex;
		/* #endif */
		flex-direction: row;
		align-items: center;
		justify-content: center;
		padding: 0 8px;
		background-color: $bg;
		/* #ifdef H5 */
		cursor: pointer;
		/* #endif */
	}

	.uni-numbox__value {
		margin: 0 2px;
		background-color: $bg;
		width: 40px;
		height: $box-height;
		text-align: center;
		font-size: 14px;
		border-left-width: 0;
		border-right-width: 0;
		color: $color;
	}

	.uni-numbox__minus {
		border-top-left-radius: $br;
		border-bottom-left-radius: $br;
	}

	.uni-numbox__plus {
		border-top-right-radius: $br;
		border-bottom-right-radius: $br;
	}

	.uni-numbox--text {
		// fix nvue
		line-height: 20px;

		font-size: 20px;
		font-weight: 300;
		color: $color;
	}

	.uni-numbox .uni-numbox--disabled {
		color: #c0c0c0 !important;
		/* #ifdef H5 */
		cursor: not-allowed;
		/* #endif */
	}
</style>
